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2. Buzzer control (GPIO)
Buzzer control
Buzzer control1. Software-Hardware2. Brief principle1. Hardware schematic diagram2. Physical connection diagram3. Control principle3. Project configuration1. Description2. Pin configuration4. Main functionsUser function5. Experimental phenomena
This tutorial demonstrates: controlling the onboard active buzzer on the development board through the output function of GPIO.
1. Software-Hardware
STM32F103CubeIDE
STM32 Robot Development Board
GPIO: chip internal peripherals
Active buzzer: onboard
Type-C data cable or ST-Link
Download programs or simulate the development board
2. Brief principle
1. Hardware schematic diagram
2. Physical connection diagram
3. Control principle
Control the buzzer sound by controlling the high and low levels of the buzzer pin.
Buzzer: High level sounds, low level does not sound
| Buzzer (schematic name) | control pin | Function |
|---|---|---|
| Buzzer | PG12 | Control the buzzer sound |
- buzzer
| buzzer | Features |
|---|---|
| Active buzzer | It has its own internal oscillation source, and the sound can be controlled by setting high or low levels, and the sound frequency is fixed. |
| Passive buzzer | There is no internal oscillation source, and different oscillation pulse frequencies are provided to emit non-frequency sounds. |
3. Project configuration
Project configuration: Prompt configuration options during STM32CubeIDE project configuration
1. Description
Omitted project configuration part: New project, chip selection, project configuration, SYS of pin configuration, RCC configuration, clock configuration and project configuration content
The project configuration part that is not omitted is the key point that needs to be configured in this tutorial.
xxxxxxxxxxPlease refer to [2. Development environment construction and use: STM32CubeIDE installation and use] to understand how to configure the omitted parts of the project.
2. Pin configuration
- Configure specified pin function
You can directly select the corresponding pin number in the pin view, and the corresponding options will appear when you left-click the mouse.
- GPIO
- Advanced Settings
- Generate code
4. Main functions
It mainly introduces the functional code written by the user. For detailed code, you can open the project file provided by us yourself and enter the Bsp folder to view the source code.
User function
The HAL library functions that have been introduced in the previous tutorial will not be introduced again in the tutorial!
xxxxxxxxxxIf you want to find the HAL library and LL library function analysis involved in the entire tutorial, you can view the documents in the folder [8. STM32 Manual: STM32F1_HAL Library and LL Library_User Manual]
function ：Set_Buzzer
| function prototype | void Set_Buzzer(uint8_t i) |
|---|---|
| Function description | control buzzer |
| Input parameters | i: switch (0: off, 1: on) |
| return value | none |
5. Experimental phenomena
After downloading the program successfully, press the RESET button of the development board and observe the development board phenomenon!
xxxxxxxxxxFor program download, please refer to [2. Development environment construction and use: program download and simulation]
Phenomenon:
Buzzer: The time interval between sounding and not sounding is 0.2 seconds
For experimental phenomena, please see [Buzzer Control_Experimental Phenomenon.mp4]